private void createFromTagNames(List<String> tagNames) {
Set<String> existingNames =
tagRepository.findByNames(tagNames).stream().map(Tag::getName).collect(Collectors.toSet());
Set<String> tagNamesToPersist = new HashSet<>(tagNames);
tagNamesToPersist.removeAll(existingNames);
if (!tagNamesToPersist.isEmpty()) {
tagRepository.save(tagNamesToPersist.stream().map(Tag::new).collect(Collectors.toList()));
}
}
public List<Tag> searchTags(String queryString) {
if (null == queryString || queryString.isEmpty()) {
return Collections.emptyList();
}
return tagRepository.searchByName(queryString);
}
public List<Tag> listTags() {
return toStream(tagRepository.findAll()).collect(Collectors.toList());
}
@Transactional
public List<Tag> upsertTagDtos(List<TagDto> tags) {
List<String> tagNames = tags.stream().map(TagDto::getName).collect(Collectors.toList());
createFromTagNames(tagNames);
return tagRepository.findByNames(tagNames);
}